Features 1、25 assignable velocity-sensitive keys with excellent performance; 8 assignable trigger pads with colorful backlit in working status, comfortable and accurate. 2、4 MIDI control groups: 4 assignable control knobs plus 4 assignable control sliders; 4 banks for different settings. 3、8 control buttons: CC Mode, Mod, Bank, Prog, Pitch down, Pitch up, Octave down, Octave up. Specification Features: 25 assignable velocity-sensitive keys with excellent performance; 8 assignable trigger pads with colorful backlit in working status, comfortable and accurate. 4 MIDI control groups: 4 assignable control knobs plus 4 assignable control sliders; 4 banks for different settings. 8 control buttons: CC Mode, Mod, Bank, Prog, Pitch down, Pitch up, Octave down, Octave up. USB 2.0 Plug and Play, no need of driver installation; USB bus powered and no additional power cable needed. Compatible with Win10/ Win 8 / Win 7 / Win XP / Win Vista / Mac OSX; and compatible with CAKEWALK and other mainstream music software. Specifications: Color: Black + White Material: Plastic Operating system: Support for Win10/ Win 8 / Win 7 / Win XP / Win Vista / Mac OSX. Item size: 32 * 19 * 3cm / 12.6 * 7.5 * 1.2in Item weight: 745g / 1.6lbs Package size: 36 * 22 * 5cm / 14.2 * 8.7 * 2in Package weight: 970g / 2.1lbs Note: Not support for Windows 98, Me, NT and 2000. G3/G4 accelerator cards are not supported. Package List: 1 * MIDI Controller 1 * USB Cable Package List 1 * MIDI Controller 1 * USB Cable